1.- Downloaad this repo from github on 2.8.3 version only, on other versions may change due to core changes.
2.- Enable plugin.
3.- Go to styles and templates and verify avatarep.css exists and got content.
4.- Make changes on style and templates to set visual customization.
5.- Config adjustments of plugin opts.
6.- Edit annother things like modal or contents.
7.- Enjoy !!!

We don't have avatarep.css, then go to styles and create a new stylesheet called avatarep.css, inside this go to advanced mode and paste this content.